Air flow distribution system for data center server racks

CROSS-REFERENCE TO RELATED APPLICATIONS

0001This application is a continuation of International Application No. PCT/US2013/028475 filed on Feb. 28, 2013, which claims priority to U.S. Provisional Patent Application No. 61/605,149 filed on Feb. 29, 2012, the entire contents of each of which are incorporated by reference herein.

BACKGROUND

0002Due to the generation of large quantities of heat by electronics contained within data center server racks, large amounts of power are consumed for cooling of server racks. A contributing factor to the large power consumption lies in the irregularities in the air flow that cools the server racks.

SUMMARY

0003The embodiments of the present disclosure are directed to an air flow distribution system for cooling server racks that reduce the power consumption required for cooling of server racks.

0004More particularly, in one exemplary embodiment, an air flow distribution system for cooling server racks includes at least one server rack partially defining a hot aisle and a cold aisle, a first air foil disposed above the at least one server rack, and a second air foil disposed above the first air foil. The first air foil and the second air foil are configured to receive air from the hot aisle, and to form turbulent wake patterns in the cold aisle partially defined by the at least one server rack. The air flow distribution system may further include a ceiling member disposed above the second air foil. The first air foil, the second air foil, and the ceiling member may be configured to receive air from the hot aisle and to form turbulent wake patterns in the cold aisle partially defined by the at least one server rack.

0005The air flow distribution system may further include at least one air circulation member that is configured to direct air between the first air foil and the second air foil or between the ceiling member and the first air foil and between the first air foil and the second air foil. The one or more air circulation members may include at least one fan.

0006In still a further exemplary embodiment, at least a portion of the ceiling member may include a convex surface that interfaces with the air flowing from the hot aisle to the cold aisle. The ceiling member is disposed at least partially downstream of the second air foil.

0007The first air foil may include a surface that is convex with respect to the air flow, and the second air foil may include a first surface that is concave with respect to the air flow and a second surface that is convex with respect to the air flow.

0008In yet another exemplary embodiment, the first air foil may be configured and movably coupled to cover an electrical enclosure receptacle configured to receive at least one cable or a support member for the at least one cable for the at least one server rack. The first air foil may be configured to rotatably move to enable access to the at least one cable or a support member for the at least one cable. The cable may include an electrical cable, a fiber-optic cable, or a combination of an electrical cable and a fiber-optic cable.

0009In yet another exemplary embodiment, the present disclosure relates to a method for distributing air flow for cooling server racks. The method includes disposing at least one server rack at least partially defining a hot aisle and a cold aisle, and causing air to be directed between a first air foil disposed above the at least one server rack and a second air foil disposed above the first air foil. The air exiting from the first air foil and the second air foil form turbulent wake patterns in the cold aisle at least partially defined by the at least one server rack.

0010In another exemplary embodiment, causing the air to be directed between the first air foil and the second air foil includes causing the air to be directed between a ceiling member disposed above the second air foil and the second air foil, and between the first air foil and the second air foil. The air exiting from the ceiling member, the first air foil, and the second air foil form turbulent wake patterns in the cold aisle partially defined by the at least one server rack. The ceiling member may be configured as a convex surface that interfaces with the air flowing from the hot aisle to the cold aisle, and the method may include causing the air to be directed between the ceiling member configured as a convex surface and the second air foil and between the second air foil and the first air foil, wherein the air exiting from the at least one ceiling member configured as a convex surface, the second air foil, and the first air foil form turbulent wake patterns in the cold aisle partially defined by the at least one server rack.

0011In one other exemplary embodiment, the first air foil is configured and movably coupled to cover an electrical enclosure receptacle configured to receive at least one cable or a support member for the at least one cable, and the method may include causing the air to be directed between the first air foil that is configured and movably coupled to cover the electrical enclosure receptacle and the second air foil.

0012In yet another exemplary embodiment, the first air foil is further configured to rotatably move to enable access to the at least one cable or a support member for the at least one cable, and the method may include causing the air to be directed between the first air foil that is configured to rotatably move to enable access to the at least one cable or a support member for the at least one cable and the second air foil. The cable received by the electrical enclosure receptacle may include an electrical cable, a fiber-optic cable, or a combination of an electrical cable and a fiber-optic cable, and the method may include causing the air to be directed between the first air foil that is configured and movably coupled to cover the electrical enclosure receptacle receiving the cable and the second air foil.

0013In yet another exemplary embodiment, the present disclosure relates to an electrical enclosure assembly for at least one server rack at least partially defining a hot aisle and a cold aisle, that includes an electrical enclosure receptacle configured to receive at least one cable or a support member of the at least one cable, and a cover member movably coupled to cover the electrical enclosure receptacle, the cover member configured as an air foil for air flowing between the hot aisle and the cold aisle.

0014In yet another exemplary embodiment of the electrical enclosure assembly, the cover member configured as an air foil is a first air foil, and the electrical enclosure assembly may further include a second air foil, wherein the first air foil and the second air foil are configured to form in the cold aisle turbulent wake patterns in the air flowing into the cold aisle. An air circulation member may direct the air flowing between the first air foil and the second air foil. The cover member may be configured to rotatably move to enable access to the at least one cable or a support member of the at least one cable.

0015In yet another exemplary embodiment, the electrical enclosure assembly may further include a lighting enclosure assembly configured to receive at least one lighting member configured and disposed to project light, wherein at least a portion of the lighting enclosure assembly forms an extension of the air foil. The electrical enclosure assembly may further include at least one lighting member disposed in the lighting enclosure assembly.

BRIEF DESCRIPTION OF THE DRAWINGS

0016Various embodiments of the present disclosure are described with reference to the accompanying drawings wherein:

0017<figref idref="DRAWINGS">FIG. <b>1</b></figref> is a plan view of a portion of a data center subassembly that includes adjacent server racks forming a first side of a central hot aisle and adjacent server racks forming a second side of the central hot aisle;

0018<figref idref="DRAWINGS">FIG. <b>2</b></figref> is an elevation view of a portion of the data center subassembly illustrating sets of three fans above sets of adjacent server racks in which the sets of adjacent server racks are disposed between respective vertical columns;

0019<figref idref="DRAWINGS">FIG. <b>3</b></figref> is a partial view of the elevation view of <figref idref="DRAWINGS">FIG. <b>2</b></figref> of a portion of the data center subassembly illustrating sets of three fans that are positioned above sets of adjacent server racks that are disposed between vertical columns, and partially projecting over upper air foils that are positioned above sets of adjacent server racks according to one exemplary embodiment of the present disclosure;

0020<figref idref="DRAWINGS">FIG. <b>4</b></figref> is an end elevation view of the portion of the data center subassembly of <figref idref="DRAWINGS">FIGS. <b>1</b>, <b>2</b>, and <b>3</b></figref> showing a central hot aisle having a common fan enclosure above the hot aisle;

0021<figref idref="DRAWINGS">FIG. <b>5</b></figref> is a perspective view looking at the portion of the data center subassembly of <figref idref="DRAWINGS">FIGS. <b>1</b>-<b>4</b></figref> from below;

0022<figref idref="DRAWINGS">FIG. <b>6</b>A</figref> is a perspective view of the portion of the data center subassembly illustrating a cold aisle opposite the central hot aisle and light boxes that include covers that also serve as lower air foils with respect to upper air foils;

0023<figref idref="DRAWINGS">FIG. <b>6</b>B</figref> is an end elevation view of <figref idref="DRAWINGS">FIG. <b>6</b>A</figref> and illustrates a contoured concave ceiling of the central cold aisle to form turbulent wake patterns in the central cold aisle for more efficient cooling of the sets of server racks according to exemplary embodiments of the present disclosure;

0024<figref idref="DRAWINGS">FIG. <b>7</b>A</figref> is a perspective view of the portion of the data center subassembly of <figref idref="DRAWINGS">FIGS. <b>6</b>A and <b>6</b>B</figref> showing the air foils, which also serve as light box covers, hinged up at an angle to allow access to the cable trays;

0025<figref idref="DRAWINGS">FIG. <b>7</b>B</figref> is an end elevation view of the portion of the data center subassembly of <figref idref="DRAWINGS">FIG. <b>7</b>A</figref> showing the air foils, which also serve as light box covers, hinged up at an angle to allow access to the cable trays;

0026<figref idref="DRAWINGS">FIG. <b>8</b></figref> is a perspective view of the cold aisle of <figref idref="DRAWINGS">FIGS. <b>6</b>A, <b>6</b>B, <b>7</b>A, <b>7</b>B</figref> with the person positioned to illustrate an exemplary height of the sets of server racks and the elevation of the air foils above the light boxes;

0027<figref idref="DRAWINGS">FIG. <b>9</b></figref> is an end elevation view of the portion of the data center subassembly of <figref idref="DRAWINGS">FIGS. <b>6</b>A-<b>8</b></figref> illustrating the hot aisle opposite the central cold aisle and light boxes that include covers that also serve as lower air foils with respect to upper air foils and a contoured concave ceiling of the central cold aisle to form turbulent wake patterns in the central cold aisle for more efficient cooling of the sets of server racks according to exemplary embodiments of the present disclosure;

0028<figref idref="DRAWINGS">FIG. <b>10</b>A</figref> includes an exploded perspective view of the electrical light and cable tray box and the dual purpose cover and lower air foil according to one exemplary embodiment of the present disclosure;

0029<figref idref="DRAWINGS">FIG. <b>10</b>B</figref> includes an elevation view proximal to a user of the electrical light and cable tray boxes and the covers, which also server as lower air foils according to <figref idref="DRAWINGS">FIG. <b>10</b>A</figref>;

0030<figref idref="DRAWINGS">FIG. <b>10</b>C</figref> includes another elevation view of the electrical light and cable tray boxes and the dual purpose covers and lower air foils according to <figref idref="DRAWINGS">FIG. <b>10</b>A</figref>;

0031<figref idref="DRAWINGS">FIG. <b>10</b>D</figref> includes another view of the electrical light and cable tray boxes and the dual purpose covers and lower air foils according to <figref idref="DRAWINGS">FIG. <b>10</b>A</figref>;

0032<figref idref="DRAWINGS">FIG. <b>10</b>E</figref> is a detailed view of an extendable strut member illustrated in <figref idref="DRAWINGS">FIG. <b>10</b>E</figref>;

0033<figref idref="DRAWINGS">FIG. <b>11</b>A</figref> includes a perspective view of the contoured or concave ceiling that is positioned above the cold aisle in <figref idref="DRAWINGS">FIGS. <b>6</b>A-<b>7</b>B and <b>9</b></figref> above;

0034<figref idref="DRAWINGS">FIG. <b>11</b>B</figref> includes an elevation view of the contoured or concave ceiling of <figref idref="DRAWINGS">FIG. <b>11</b>A</figref> that is positioned above the cold aisle;

0035<figref idref="DRAWINGS">FIG. <b>11</b>C</figref> includes another elevation view of the contoured or concave ceiling of <figref idref="DRAWINGS">FIG. <b>11</b>A</figref> that is positioned above the cold aisle;

0036<figref idref="DRAWINGS">FIG. <b>11</b>D</figref> includes another view of the contoured or concave ceiling of <figref idref="DRAWINGS">FIG. <b>11</b>A</figref> that is positioned above the cold aisle; and

0037<figref idref="DRAWINGS">FIG. <b>12</b></figref> illustrates an alternative embodiment of the portion of the data center subassembly <b>10</b> illustrated in <figref idref="DRAWINGS">FIG. <b>8</b></figref> that includes as a ceiling a wave-like sheet-metal canopy above the hot aisle and crossing above the sets of three fans <figref idref="DRAWINGS">FIGS. <b>1</b>-<b>5</b></figref>, and crossing above the cold aisle.

DETAILED DESCRIPTION

0038The present disclosure relates to an air flow distribution system for server racks that significantly reduces the power requirements for cooling server racks within data centers.

0039Various embodiments of the present disclosure are described with reference to the accompanying drawings as follows.

0040<figref idref="DRAWINGS">FIG. <b>1</b></figref> is a plan view of a portion of a data center subassembly <b>10</b> that includes adjacent server racks <b>21</b><i>a</i>, <b>21</b><i>b</i>, . . . , <b>21</b><i>n </i>forming a first side of a central hot aisle <b>25</b> and adjacent server racks <b>22</b><i>a</i>, <b>22</b><i>b</i>, . . . , <b>22</b><i>n </i>forming a second side of the central hot aisle <b>25</b>.

0041A set of active air circulation members or forced air circulation members, e.g., three fans <b>31</b><i>a</i>, are disposed above server rack <b>21</b><i>a </i>and a set of active air circulation members or forced air circulation members, e.g., three fans <b>32</b><i>a</i>, are disposed above server racks <b>22</b><i>a</i>. Other sets of active circulation members or forced circulation members, e.g., fans, are also correspondingly disposed with the other server racks <b>21</b><i>b</i>, . . . , <b>21</b><i>n </i>and <b>22</b><i>b</i>, . . . , <b>22</b><i>n</i>. The fans <b>31</b><i>a</i>, <b>32</b><i>a </i>are positioned to circulate air in the upward vertical direction to remove heat from the central hot aisle <b>25</b>.

0042<figref idref="DRAWINGS">FIGS. <b>2</b> and <b>3</b></figref> are elevation views of the portion of the data center subassembly <b>10</b> mounted on floor <b>165</b> and illustrating sets of active circulation members or forced circulation members, e.g., sets of three fans <b>32</b><i>a</i>, <b>32</b><i>b</i>, <b>32</b><i>c</i>, <b>32</b><i>d</i>, <b>32</b><i>e</i>, <b>32</b><i>f</i>, above sets of adjacent server racks <b>22</b><i>a</i>, <b>22</b><i>b</i>, <b>22</b><i>c</i>, <b>22</b><i>d</i>, <b>22</b><i>e</i>, <b>22</b><i>f</i>, respectively. Sets of adjacent server racks <b>22</b><i>a</i>, <b>22</b><i>b</i>, <b>22</b><i>c</i>, <b>22</b><i>d</i>, <b>22</b><i>e</i>, <b>22</b><i>f </i>are disposed between respective vertical columns <b>421</b>, <b>422</b>, <b>423</b>, <b>424</b>, <b>425</b>, <b>426</b>, <b>427</b>.

0043As particularly illustrated in <figref idref="DRAWINGS">FIG. <b>3</b></figref>, the sets of three fans <b>32</b><i>a</i>, <b>32</b><i>b</i>, <b>32</b><i>c</i>, <b>32</b><i>d </i>partially project over upper air foil <b>34</b><i>a</i>, <b>34</b><i>b</i>, <b>34</b><i>c</i>, <b>34</b><i>d </i>that are positioned above sets of adjacent server racks <b>22</b><i>a</i>, <b>22</b><i>b</i>, <b>22</b><i>c</i>, <b>22</b><i>d</i>, respectively.

0044<figref idref="DRAWINGS">FIG. <b>4</b></figref> is an end elevation view of the portion of the data center subassembly <b>10</b> showing the central hot aisle <b>25</b> having a common fan enclosure <b>51</b> above the hot aisle <b>25</b>. Opposing vertical columns <b>411</b> and <b>421</b> are disposed on opposite sides of the hot aisle <b>25</b>. The sets of server racks <b>21</b><i>a</i>, . . . , <b>21</b><i>e </i>and <b>22</b><i>a</i>, . . . , <b>22</b><i>e </i>at least partially define the hot aisle <b>25</b>.

0045<figref idref="DRAWINGS">FIG. <b>5</b></figref> is a perspective view looking at the portion of the data center subassembly <b>10</b> of <figref idref="DRAWINGS">FIGS. <b>1</b>-<b>4</b></figref> from below illustrating the data center subassembly <b>10</b> mounted on floor <b>165</b>.

0046<figref idref="DRAWINGS">FIGS. <b>6</b>A and <b>6</b>B</figref> illustrate the portion of the data center subassembly <b>10</b> (with column <b>422</b> omitted) and a cold aisle <b>45</b> opposite central hot aisle <b>25</b> with a person <b>5</b> standing in the cold aisle to illustrate one embodiment of the height of the sets of server racks <b>22</b><i>a</i>, <b>22</b><i>b</i>. The sets of server racks <b>22</b><i>a</i>, <b>22</b><i>b </i>. . . at least partially define the hot aisle <b>25</b> and the cold aisle <b>45</b>. Electrical enclosure assemblies <b>50</b><i>a </i>and <b>50</b><i>b </i>include electrical enclosure receptacles or light and cable tray boxes <b>52</b><i>a</i>, <b>52</b><i>b</i>, and are disposed immediately above adjacent sets of server racks <b>22</b><i>a</i>, <b>22</b><i>b</i>, respectively. The light and cable tray boxes <b>52</b><i>a</i>, <b>52</b><i>b </i>include cable support members, e.g., upper cable tray <b>621</b> and lower cable tray <b>622</b>. The upper cable tray <b>621</b> and lower cable tray <b>622</b> support cables that may carry electricity and/or data to and/or from the sets of server racks <b>22</b><i>a</i>, <b>22</b><i>b </i>. . . . The cables may include electrically conductive cables, fiber-optic cables, or other types of cables for conveying power, control signals, data, and the like.

0047As illustrated in <figref idref="DRAWINGS">FIGS. <b>8</b> and <b>10</b>A-<b>10</b>E</figref>, in conjunction with <figref idref="DRAWINGS">FIGS. <b>6</b>A and <b>6</b>B</figref>, the electrical enclosure assemblies <b>50</b><i>a</i>, <b>50</b><i>b </i>include electrical enclosure receptacles or light and cable tray boxes <b>52</b><i>a</i>, <b>52</b><i>b </i>and covers <b>54</b><i>a</i>, <b>54</b><i>b</i>, respectively, for the electrical enclosure receptacles or light and cable tray boxes <b>52</b><i>a</i>, <b>52</b><i>b </i>that also serve as first or lower air foils with respect to second or upper air foils <b>34</b><i>a</i>, <b>34</b><i>b</i>. That is, upper air foils <b>34</b><i>a </i>and <b>34</b><i>b </i>are positioned at a suitable distance D<b>1</b> above lower air foils <b>54</b><i>a </i>and <b>54</b><i>b</i>, respectively.

0048The first or lower air foils or covers <b>54</b><i>a</i>, <b>54</b><i>b </i>are configured and movably coupled to cover the electrical enclosure receptacles <b>52</b><i>a</i>, <b>52</b><i>b </i>(see <figref idref="DRAWINGS">FIGS. <b>10</b>A-<b>10</b>E</figref>) that are configured to receive cables <b>6211</b>, <b>6222</b> (see <figref idref="DRAWINGS">FIG. <b>8</b></figref>) or a support member, e.g., cable trays <b>621</b>, <b>622</b>, respectively (see <figref idref="DRAWINGS">FIG. <b>8</b></figref>), for the cables <b>6211</b>, <b>6222</b> for the sets of one or more server racks <b>22</b><i>a </i>or <b>22</b><i>b</i>. The cables <b>6211</b>, <b>6222</b> may include an electrical cable, a fiber-optic cable, or a combination of an electrical cable and a fiber-optic cable. The sets of three fans <b>32</b><i>a</i>, <b>32</b><i>b </i>are positioned to exhaust cold air from the common fan enclosure <b>51</b> at an angle Φ<b>1</b> with respect to the vertical of approximately 45 degrees towards a ceiling member <b>65</b> above the adjacent sets of server racks <b>22</b><i>a</i>, <b>22</b><i>b. </i>

0049The cold aisle <b>45</b> includes a contoured or convex ceiling member <b>75</b> extending at least partially along the cold aisle <b>45</b>. The contoured or convex ceiling member <b>75</b> is disposed a distance D<b>2</b> from the upper air foils <b>34</b><i>a</i>, <b>34</b><i>b </i>such that a portion of the cold air flowing from the sets of three fans <b>32</b><i>a</i>, <b>32</b><i>b </i>is deflected downwardly into the cold aisle <b>45</b> by the contoured or convex ceiling member <b>75</b> and the upper air foils <b>34</b><i>a</i>, <b>34</b><i>b</i>, as indicated by the arrows A. The distance D<b>2</b> defines the dimension of an effective nozzle throat defined by the upper air foils <b>34</b><i>a</i>, <b>34</b><i>b </i>and the contoured or convex ceiling member <b>75</b>. The ceiling member <b>75</b> thus includes a convex surface <b>751</b> that interfaces with the air indicated by arrows A flowing from the hot aisle <b>25</b> to the cold aisle <b>45</b>. The ceiling member <b>75</b> is disposed at least partially downstream of the upper air foils <b>34</b><i>a</i>, <b>34</b><i>b. </i>

0050Another portion of the cold air flowing from the sets of three fans <b>32</b><i>a</i>, <b>32</b><i>b </i>is deflected downwardly into the cold aisle <b>45</b> by the upper air foils <b>34</b><i>a</i>, <b>34</b><i>b </i>and the lower air foils <b>54</b><i>a</i>, <b>54</b><i>b </i>through the area defined by the distance D<b>1</b>.

0051As can be appreciated by the foregoing, the first or lower air foils <b>54</b><i>a</i>, <b>54</b><i>b </i>include surfaces <b>541</b><i>a</i>, <b>541</b><i>b </i>that are convex with respect to the air flow indicated by the arrows A. The second or upper air foils <b>34</b><i>a</i>, <b>34</b><i>b </i>include first surfaces <b>341</b><i>a</i>, <b>341</b><i>b </i>that are concave with respect to the air flow indicated by the arrows A and concave with respect to the surfaces <b>541</b><i>a</i>, <b>541</b><i>b </i>of the lower air foils <b>54</b><i>a</i>, <b>54</b><i>b </i>that are convex with respect to the air flow indicated by the arrows A. The second or upper air foils <b>34</b><i>a</i>, <b>34</b><i>b </i>include second surfaces <b>342</b><i>a</i>, <b>342</b><i>b </i>that are convex with respect to the air flow indicated by the arrows A.

0052In conjunction with the electrical enclosure assemblies <b>50</b><i>a</i>, <b>50</b><i>b</i>, the electrical enclosure assemblies <b>50</b><i>a</i>, <b>50</b><i>b </i>each may further include lighting enclosure assemblies <b>521</b><i>a</i>, <b>521</b><i>b </i>that are configured to receive at least one lighting member <b>522</b><i>a</i>, <b>522</b><i>b</i>, respectively, that is configured and disposed to project light L, wherein at least a portion of the lighting enclosure assemblies <b>521</b><i>a</i>, <b>521</b><i>b </i>forms an extension <b>54</b><i>a</i>′, <b>54</b><i>b</i>′ of the first air foils or covers <b>54</b><i>a</i>, <b>54</b><i>b</i>. The lighting enclosure assemblies <b>521</b><i>a</i>, <b>521</b><i>b </i>may each further include at least one lighting member <b>522</b><i>a</i>, <b>522</b><i>b </i>disposed in the lighting enclosure assemblies <b>521</b><i>a</i>, <b>521</b><i>b</i>, respectively.

0053The light L may project vertically downward toward the floor <b>165</b> supporting the sets of one or more server racks <b>22</b><i>a</i>, <b>22</b><i>b</i>. In one exemplary embodiment, the electrical enclosure assemblies <b>50</b><i>a</i>, <b>50</b><i>b </i>may further include the second or upper air foils <b>34</b><i>a</i>, <b>34</b><i>b </i>(in conjunction with support of the second or upper air foils <b>34</b><i>a</i>, <b>34</b><i>b </i>by at least one of the vertical columns, e.g., column <b>421</b> or column <b>423</b> or both). Due to the forced flow of the air from the contoured or convex ceiling member <b>75</b>, the upper air foils <b>34</b><i>a</i>, <b>34</b><i>b </i>and the lower air foils <b>54</b><i>a</i>, <b>54</b><i>b</i>, both portions of the air flowing therefrom are formed into turbulent wake patterns <b>100</b> in the cold aisle <b>45</b>.

0054The formation of the turbulent wake patterns <b>100</b> results in enhanced, more efficient cooling of the sets of server racks <b>22</b><i>a</i>, <b>22</b><i>b</i>. Increases or decreases in the strength or occurrence of the turbulent wake patterns <b>100</b> may be controlled by varying the operating speed of at least one fan in the sets of three fans <b>32</b><i>a</i>, <b>32</b><i>b</i>. Consequently, the first or lower air foils, which also serve as covers, <b>54</b><i>a</i>, <b>54</b><i>b</i>, the second or upper air foils <b>34</b><i>a</i>, <b>34</b><i>b</i>, and the contoured or convex ceiling members <b>75</b> are aerodynamically designed to create the turbulent wake patterns <b>100</b>.

0055Thus, an air flow distribution system <b>80</b> for cooling of the sets of server racks, e.g., server racks <b>22</b><i>a</i>, <b>22</b><i>b</i>, is defined by at least one server rack, e.g., server racks <b>22</b><i>a</i>, <b>22</b><i>b</i>, at least partially defining hot aisle <b>25</b> and cold aisle <b>45</b>, a first air foil, e.g., lower air foils <b>54</b><i>a</i>, <b>54</b><i>b</i>, disposed above the one or more server racks <b>22</b><i>a</i>, <b>22</b><i>b</i>, and a second air foil, e.g., upper air foils <b>34</b><i>a</i>, <b>34</b><i>b</i>, disposed above the first air foil, e.g., lower air foils <b>54</b><i>a</i>, <b>54</b><i>b</i>, wherein the first air foil <b>54</b><i>a </i>and/or <b>54</b><i>b </i>and the second air foil <b>34</b><i>a </i>and/or <b>34</b><i>b </i>are configured to receive the air indicated by arrows A from the hot aisle <b>25</b>, and to form turbulent wake patterns <b>100</b> in the cold aisle <b>45</b> partially defined by the one or more sets of server racks, e.g., <b>22</b><i>a </i>and <b>22</b><i>b. </i>

0056The air flow distribution system <b>80</b> may further include at least one active circulation member or forced circulation member, e.g., the sets of three fans <b>32</b><i>a</i>, <b>32</b><i>b</i>, the ceiling member <b>65</b>, the contoured or convex ceiling member <b>75</b>, at least one of the second or upper air foils <b>34</b><i>a</i>, <b>34</b><i>b</i>, and at least one of the first or lower air foils <b>54</b><i>a</i>, <b>54</b><i>b</i>, such that the configurations and geometrical relationships between these components cause the formation of the turbulent wake patterns <b>100</b> in the cold aisle <b>45</b> as described herein.

0057In one exemplary embodiment of the air flow distribution system <b>80</b>, the cold aisle <b>45</b> includes a planar or flat surface such as ceiling member <b>65</b>′ extending at least partially along the cold aisle <b>45</b>, as illustrated by the dashed line in <figref idref="DRAWINGS">FIG. <b>6</b>B</figref>, as opposed to the contoured or convex ceiling member <b>75</b>. The planar or flat surface ceiling member <b>65</b>′ is disposed a distance D<b>2</b>′ from the upper air foils <b>34</b><i>a</i>, <b>34</b><i>b </i>such that a portion of the cold air flowing from the sets of active circulation members, e.g., three fans <b>32</b><i>a</i>, <b>32</b><i>b</i>, is deflected downwardly into the cold aisle <b>45</b> by the planar or flat surface ceiling <b>65</b>′ and the upper air foils <b>34</b><i>a</i>, <b>34</b><i>b</i>. The distance D<b>2</b>′ defines the diameter of an effective nozzle throat defined by the upper air foils <b>34</b><i>a</i>, <b>34</b><i>b </i>and the planar or flat surface ceiling <b>65</b>′.

0058<figref idref="DRAWINGS">FIGS. <b>7</b>A and <b>7</b>B</figref> illustrate the portion of the data center subassembly <b>10</b> of <figref idref="DRAWINGS">FIGS. <b>6</b>A and <b>6</b>B</figref> showing the electrical equipment enclosures or light and cable tray boxes <b>52</b><i>a</i>, <b>52</b><i>b </i>and the air foils <b>54</b><i>a</i>, <b>54</b><i>b</i>, which also serve as light box covers, hinged up at an angle θ of about 35 degrees (with respect to the initial position of the air foils <b>54</b><i>a</i>, <b>54</b><i>b </i>as illustrated in <figref idref="DRAWINGS">FIG. <b>6</b>B</figref>) to allow access to the cable trays <b>621</b>, <b>622</b>. Thus, the first air foils <b>54</b><i>a</i>, <b>54</b><i>b </i>are configured to rotatably move to enable access to the one or more cables <b>6211</b>, <b>6222</b> or the support members, e.g., cable trays <b>621</b>, <b>622</b>, of the one or more cables <b>6211</b>, <b>6222</b>, respectively.

0059<figref idref="DRAWINGS">FIG. <b>8</b></figref> is a perspective view of the cold aisle <b>45</b> of <figref idref="DRAWINGS">FIGS. <b>6</b>A-<b>7</b>B</figref> with the person <b>5</b> positioned to illustrate an exemplary height of the sets of server racks <b>22</b><i>a</i>, <b>22</b><i>b. </i>

0060As described above with respect to <figref idref="DRAWINGS">FIG. <b>6</b>B</figref>, <figref idref="DRAWINGS">FIG. <b>8</b></figref> also illustrates that the first or lower air foils or covers <b>54</b><i>a</i>, <b>54</b><i>b </i>are configured and movably coupled to cover an electrical enclosure receptacle <b>52</b><i>a </i>or <b>52</b><i>b </i>(see <figref idref="DRAWINGS">FIGS. <b>10</b>A-<b>10</b>E</figref>) that is configured to receive cables <b>6211</b>, <b>6222</b> or a support member, e.g., cable trays <b>621</b>, <b>622</b>, respectively, of the cables <b>6211</b>, <b>6222</b> for the sets of one or more server racks <b>22</b><i>a</i>, <b>22</b><i>b</i>. The cables <b>6211</b>, <b>6222</b> may include an electrical cable, a fiber-optic cable, or a combination of an electrical cable and a fiber-optic cable.

0061Additionally, <figref idref="DRAWINGS">FIG. <b>8</b></figref> also illustrates the electrical enclosure assemblies <b>50</b><i>a</i>, <b>50</b><i>b</i>, each of which may further include lighting enclosure assemblies <b>521</b><i>a</i>, <b>521</b><i>b </i>that are configured to receive at least one lighting member <b>522</b><i>a</i>, <b>522</b><i>b</i>, respectively, that is configured and disposed to project light L, wherein at least a portion of the lighting enclosure assemblies <b>521</b><i>a</i>, <b>521</b><i>b </i>forms an extension <b>54</b><i>a</i>′, <b>54</b><i>b</i>′ of the first air foils or covers <b>54</b><i>a</i>, <b>54</b><i>b</i>. As previously described, the lighting enclosure assemblies <b>521</b><i>a</i>, <b>521</b><i>b </i>may each further include at least one lighting member <b>522</b><i>a</i>, <b>522</b><i>b </i>disposed in the lighting enclosure assemblies <b>521</b><i>a</i>, <b>521</b><i>b</i>, respectively. The light L may project vertically downward toward the floor <b>165</b> supporting the sets of one or more server racks <b>22</b><i>a</i>, <b>22</b><i>b</i>. The lighting members <b>522</b><i>a</i>, <b>522</b><i>b </i>may be, for example, linear light-emitting diodes (LED) such as a Model S-Line S1200 manufactured by Integrated Illumination Systems, Inc. of Morris, Conn., USA.

0062<figref idref="DRAWINGS">FIG. <b>9</b></figref> is another end elevation view of the portion of the data center subassembly <b>10</b> showing light and cable tray boxes <b>51</b><i>a</i>, <b>51</b><i>b</i>, . . . disposed immediately above adjacent sets of server racks <b>21</b><i>a</i>, <b>21</b><i>b</i>, . . . , respectively. Upper air foils <b>33</b><i>a</i>, <b>33</b><i>b </i>are suitably positioned with respect to lower air foils <b>53</b><i>a</i>, <b>53</b><i>b</i>, . . . and upper air foils <b>34</b><i>a</i>, <b>34</b><i>b</i>, . . . are suitably positioned with respect to lower air foils <b>54</b><i>a</i>, <b>54</b><i>b</i>, . . . to cause the turbulent flow in cold aisle <b>45</b> as described herein. The contoured or convex ceiling member <b>75</b> is also positioned with respect to the upper air foils <b>33</b><i>a</i>, <b>33</b><i>b</i>, . . . to cause the turbulent flow in cold aisle <b>45</b> as described herein.

0063<figref idref="DRAWINGS">FIGS. <b>10</b>A-<b>10</b>E</figref> include an exploded perspective view (<figref idref="DRAWINGS">FIG. <b>10</b>A</figref>) and orthogonal views (<figref idref="DRAWINGS">FIGS. <b>10</b>B, <b>10</b>C, <b>10</b>D and <b>10</b>E</figref>) of the electrical enclosure assemblies <b>50</b><i>a</i>, <b>50</b><i>b </i>that include the electrical enclosure receptacles, e.g., light and cable tray boxes <b>51</b><i>a</i>, <b>51</b><i>b</i>, . . . , <b>52</b><i>a</i>, <b>52</b><i>b</i>, . . . , and the dual purpose covers and lower air foils <b>53</b><i>a</i>, <b>53</b><i>b</i>, . . . , <b>54</b><i>a</i>, <b>54</b><i>b . . . . </i>

0064More particularly, <figref idref="DRAWINGS">FIGS. <b>10</b>A-<b>10</b>E</figref> illustrate the dual purpose covers and lower air foils <b>53</b><i>a</i>, <b>53</b><i>b</i>, . . . , <b>54</b><i>a</i>, <b>54</b><i>b </i>. . . positioned above the light and cable tray boxes <b>51</b><i>a</i>, <b>51</b><i>b</i>, . . . , <b>52</b><i>a</i>, <b>52</b><i>b</i>, . . . . The light and cable tray boxes <b>51</b><i>a</i>, <b>51</b><i>b</i>, . . . , <b>52</b><i>a</i>, <b>52</b><i>b</i>, . . . include a first upper lateral wall <b>501</b> and a second upper lateral wall <b>503</b> positioned parallel to the first upper lateral wall <b>501</b>. The light and cable tray boxes <b>51</b><i>a</i>, <b>51</b><i>b</i>, . . . , <b>52</b><i>a</i>, <b>52</b><i>b</i>, . . . further include transverse brace member <b>510</b> proximal to a user and upper rear panel member <b>512</b> distal to a user. The first upper lateral wall <b>501</b> and the second upper lateral wall <b>503</b> are each orthogonally joined to the upper rear panel member <b>512</b>.

0065Both the first upper lateral wall <b>501</b> and the second upper lateral wall <b>503</b> are each defined by a partially curved wedge-shaped convex profile <b>505</b> and <b>507</b>, respectively, that is configured to mesh with surfaces <b>542</b><i>a</i>, <b>542</b><i>b </i>(or <b>532</b><i>a</i>, <b>532</b><i>b</i>) on sides of the first or lower air foils <b>54</b><i>a</i>, <b>54</b><i>b </i>(or <b>53</b><i>a</i>, <b>53</b><i>b</i>) that are opposite to surfaces <b>541</b><i>a</i>, <b>541</b><i>b </i>(or <b>531</b><i>a</i>, <b>531</b><i>b</i>) that are convex with respect to the air flow as described herein with respect to <figref idref="DRAWINGS">FIG. <b>6</b>B</figref>. The transverse brace member <b>510</b> supports the first upper lateral wall <b>501</b> and the second upper lateral wall <b>503</b> at the respective tips of the partially curved wedge-shaped convex profile <b>505</b> and <b>507</b>.

0066The electrical enclosure receptacles, e.g., light and cable tray boxes <b>51</b><i>a</i>, <b>51</b><i>b</i>, . . . , <b>52</b><i>a</i>, <b>52</b><i>b</i>, . . . , also include first lower lateral wall <b>502</b> and second lower lateral wall <b>504</b> that are each orthogonally joined to a lower rear panel member <b>516</b> that is distal to a user. The first lower lateral wall <b>502</b> and second lower lateral wall <b>504</b> are joined at proximal ends by the transverse brace member <b>510</b>.

0067The electrical enclosure receptacles, e.g., light and cable tray boxes <b>51</b><i>a</i>, <b>51</b><i>b</i>, . . . , <b>52</b><i>a</i>, <b>52</b><i>b</i>, . . . , are also configured such that the lower rear panel member <b>516</b> projects distally from the upper rear panel member <b>512</b> and the lower transverse edge <b>512</b>′ of the upper rear panel member <b>512</b> is joined to the upper transverse edge <b>516</b>′ of the lower rear panel member <b>516</b> by a transverse panel member <b>514</b>.

0068The first upper lateral wall <b>501</b> and the second upper lateral wall <b>503</b> each include rectangularly-shaped apertures <b>623</b> and <b>625</b>, respectively, that are each configured to receive and support cable support member or upper cable tray <b>621</b>. Correspondingly, the first lower lateral wall <b>502</b> and the second lower lateral wall <b>504</b> each include rectangularly-shaped apertures <b>624</b> and <b>626</b>, respectively, that are each configured to receive and support cable support member or lower cable tray <b>622</b>.

0069Thus, the surfaces <b>542</b><i>a</i>, <b>542</b><i>b </i>of the lower air foils <b>54</b><i>a</i>, <b>54</b><i>b </i>define a concave profile that meshes with the partially curved wedge-shaped convex profiles <b>505</b> and <b>507</b> of the first and second lateral walls <b>501</b> and <b>503</b>, respectively.

0070Referring again to <figref idref="DRAWINGS">FIG. <b>10</b>E</figref>, the lower air foils <b>54</b><i>a</i>, <b>54</b><i>b </i>also serve as covers for the electrical enclosure receptacles, e.g., light and cable tray boxes <b>51</b><i>a</i>, <b>51</b><i>b</i>, . . . , <b>52</b><i>a</i>, <b>52</b><i>b</i>, . . . . The covers or lower air foils <b>54</b><i>a</i>, <b>54</b><i>b </i>are joined to the first upper lateral wall <b>501</b> and the second upper lateral wall <b>503</b> via extendable strut members <b>531</b> and <b>533</b>, respectively. The extendable strut members <b>531</b> and <b>533</b> enable the covers or lower air foils <b>54</b><i>a</i>, <b>54</b><i>b </i>to be elevated or hinged up at the angle θ of about 35 degrees (with respect to the initial position of the air foils <b>54</b><i>a</i>, <b>54</b><i>b </i>as illustrated in <figref idref="DRAWINGS">FIG. <b>6</b>B</figref>), as described above with respect to <figref idref="DRAWINGS">FIGS. <b>7</b>A and <b>7</b>B</figref>, to allow access to the cable trays <b>621</b>, <b>622</b>.

0071<figref idref="DRAWINGS">FIGS. <b>11</b>A-<b>11</b>B</figref> include a perspective view (see <figref idref="DRAWINGS">FIG. <b>11</b>A</figref>) and orthogonal views (see <figref idref="DRAWINGS">FIGS. <b>11</b>B, <b>11</b>C, and <b>11</b>D</figref>) of the contoured or convex ceiling member <b>75</b> that is positioned above the cold aisle <b>45</b> in <figref idref="DRAWINGS">FIGS. <b>6</b>A, <b>6</b>B, <b>7</b>A, <b>7</b>B, and <b>9</b></figref> above. The contoured or convex ceiling member <b>75</b> includes the convex surface <b>751</b> that interfaces with the air indicated by arrows A flowing from the hot aisle <b>25</b> to the cold aisle <b>45</b>, as described above with respect to <figref idref="DRAWINGS">FIG. <b>6</b>B</figref>. On the side opposite to the convex surface <b>751</b>, the contoured or convex ceiling member <b>75</b> includes a concave surface <b>752</b>. The concave surface <b>752</b> includes first and second parallel lateral strips <b>761</b> and <b>762</b>, respectively, that enable attachment of the contoured or convex ceiling member <b>75</b> to the ceiling member <b>65</b> or to ceiling member <b>65</b>′. The contoured or convex ceiling member <b>75</b> may further include contoured reinforcing rib members <b>771</b>, <b>772</b>, <b>773</b>, <b>774</b> that are disposed transversely to bridge the lateral distance between the first and second parallel lateral strips <b>761</b> and <b>762</b> and are configured to mesh with the concave surface <b>752</b> so as to reinforce the structural integrity of the contoured or convex ceiling member <b>75</b>.

0072<figref idref="DRAWINGS">FIG. <b>12</b></figref> illustrates an alternative embodiment of the portion of the data center subassembly <b>10</b> illustrated in <figref idref="DRAWINGS">FIG. <b>8</b></figref>, namely a portion of a data center subassembly <b>10</b>′ that differs from the portion of the data center subassembly <b>10</b> illustrated in <figref idref="DRAWINGS">FIG. <b>8</b></figref> by the inclusion of a wave-like sheet-metal canopy <b>85</b> above the hot aisle <b>25</b> and crossing above the sets of three fans <b>31</b><i>a</i>, <b>31</b><i>b</i>, . . . <b>31</b><i>n</i>, . . . , <b>32</b><i>a</i>, <b>32</b><i>b</i>, <b>32</b><i>c</i>, . . . , <b>32</b><i>n </i>and above the sets of server racks <b>21</b><i>a</i>, <b>21</b><i>b</i>, . . . , <b>21</b><i>n </i>and <b>22</b><i>a</i>, <b>22</b><i>b</i>, <b>22</b><i>c</i>, . . . , <b>22</b><i>n </i>described above with respect to <figref idref="DRAWINGS">FIGS. <b>1</b>-<b>5</b></figref>, and crossing above the cold aisle <b>45</b> described above with respect to <figref idref="DRAWINGS">FIGS. <b>4</b>, <b>6</b>A, <b>6</b>B, <b>7</b>A, <b>7</b>B, <b>8</b> and <b>9</b></figref>. The wave-like canopy <b>85</b> serves as an alternative ceiling member to ceiling member <b>65</b> above the hot aisle <b>25</b> and adjacent sets of server racks <b>22</b><i>a</i>, <b>22</b><i>b </i>and the contoured or convex ceiling member <b>75</b> above the cold aisle <b>45</b>.

0073As can be appreciated from the foregoing description of the various figures, in some embodiments, the upper air foils <b>34</b><i>a</i>, <b>34</b><i>b </i>and lower air foils <b>54</b><i>a</i>, <b>54</b><i>b</i>, are elliptical and generally parallel to each other. The ceiling member <b>65</b>, which may be convex, or the planar or flat surface ceiling member <b>65</b>′, and the upper air foils <b>34</b><i>a</i>, <b>34</b><i>b </i>may form a nozzle to create a turbulent wake pattern <b>100</b> within the cold aisle <b>45</b> (or, in other embodiments, in the hot aisle <b>25</b>).

0074In view of the foregoing description of the air flow distribution system <b>80</b> and the electrical enclosure assemblies <b>50</b><i>a</i>, <b>50</b><i>b</i>, those skilled in the art will recognize that, as best illustrated in <figref idref="DRAWINGS">FIG. <b>6</b>B</figref>, the foregoing description also enables a method for distributing air flow for cooling server racks. More particularly, the method includes disposing at least one server rack, e.g., server racks <b>22</b><i>a</i>, <b>22</b><i>b</i>, at least partially defining the hot aisle <b>25</b> and the cold aisle <b>45</b> and causing air to be directed between a first air foil, e.g., lower air foils <b>54</b><i>a</i>, <b>54</b><i>b</i>, that are disposed above the one or more server racks, e.g., server racks <b>22</b><i>a</i>, <b>22</b><i>b</i>, and a second air foil, e.g., upper air foils <b>34</b><i>a</i>, <b>34</b><i>b</i>, disposed above the first air foil, e.g., lower air foils <b>54</b><i>a</i>, <b>54</b><i>b</i>, wherein the air exiting from the first air foil <b>54</b><i>a</i>, <b>54</b><i>b </i>and the second air foil <b>34</b><i>a</i>, <b>34</b><i>b </i>form turbulent wake patterns <b>100</b> in the cold aisle <b>45</b>.

0075In one exemplary embodiment, the method may include causing the air to be directed between the ceiling member <b>65</b>′ that is disposed above the second air foil <b>34</b><i>a</i>, <b>34</b><i>b </i>and the second air foil <b>34</b><i>a</i>, <b>34</b><i>b </i>and between the first air foil <b>54</b><i>a</i>, <b>54</b><i>a </i>and the second air foil <b>34</b><i>a</i>, <b>34</b><i>b</i>, wherein the air exiting from the ceiling member <b>65</b>′, the first air foil <b>54</b><i>a</i>, <b>54</b><i>b</i>, and the second air foil <b>34</b><i>a</i>, <b>34</b><i>b </i>form turbulent wake patterns <b>100</b> as illustrated by arrows A in the cold aisle <b>45</b> partially defined by the one or more server racks <b>22</b><i>a</i>, <b>22</b><i>b. </i>

0076In one exemplary embodiment of the method, ceiling member <b>75</b> is configured as a convex surface <b>751</b> that interfaces with the air flowing from the hot aisle <b>25</b> to the cold aisle <b>45</b>. The method may include causing the air to be directed between the ceiling member <b>75</b> configured as a convex surface <b>751</b> and the second air foil <b>34</b><i>a</i>, <b>34</b><i>b </i>and between the second air foil <b>34</b><i>a</i>, <b>34</b><i>b </i>and the first air foil <b>54</b><i>a</i>, <b>54</b><i>b</i>, wherein the air exiting from the ceiling member <b>75</b>, the second air foil <b>34</b><i>a</i>, <b>34</b><i>b</i>, and the first air foil form <b>54</b><i>a</i>, <b>54</b><i>b </i>turbulent wake patterns <b>100</b> in the cold aisle <b>45</b> partially defined by the one or more server racks <b>22</b><i>a</i>, <b>22</b><i>b. </i>

0077In one exemplary embodiment of the method, the first air foil <b>54</b><i>a</i>, <b>54</b><i>b </i>is configured and movably coupled to cover electrical enclosure receptacle <b>52</b><i>a </i>or <b>52</b><i>b </i>(see <figref idref="DRAWINGS">FIGS. <b>10</b>A-<b>10</b>E</figref>) that is configured to receive cables <b>6211</b>, <b>6222</b> or a support member, e.g., cable trays <b>621</b>, <b>622</b>, respectively, of the cables <b>6211</b>, <b>6222</b> for the sets of one or more server racks <b>22</b><i>a</i>, <b>22</b><i>b</i>. The method may include causing the air to be directed between the first air foil <b>54</b><i>a</i>, <b>54</b><i>b </i>that is configured and movably coupled to cover the electrical enclosure receptacle <b>52</b><i>a </i>or <b>52</b><i>b </i>and the second air foil <b>34</b><i>a</i>, <b>34</b><i>b. </i>

0078In one exemplary embodiment of the method, the first air foil <b>54</b><i>a</i>, <b>54</b><i>b </i>is further configured to rotatably move to enable access to the one or more cables <b>6211</b>, <b>6222</b> or the support members, e.g., cable trays <b>621</b>, <b>622</b>, of the one or more cables <b>6211</b>, <b>6222</b>, respectively. The method may include causing the air to be directed between the first air foil <b>54</b><i>a</i>, <b>54</b><i>b </i>that is configured to rotatably move to enable access to the one or more cables <b>6211</b>, <b>6222</b> or the support members, e.g., cable trays <b>621</b>, <b>622</b>, of the one or more cables <b>6211</b>, <b>6222</b>, respectively.

0079In one exemplary embodiment of the method, the cables <b>6211</b>, <b>6222</b> includes an electrical cable, a fiber-optic cable, or a combination of an electrical cable and a fiber-optic cable. The method may include causing the air to be directed between the first air foil <b>54</b><i>a</i>, <b>54</b><i>b </i>that is configured and movably coupled to cover the electrical enclosure receptacle <b>52</b><i>a </i>or <b>52</b><i>b </i>and the second air foil <b>34</b><i>a</i>, <b>34</b><i>b. </i>

0080Although the foregoing disclosure describes the air flow distribution system <b>80</b> and corresponding method as utilizing the first or lower air foils <b>54</b><i>a</i>, <b>54</b><i>b </i>. . . and the second or upper air foils <b>34</b><i>a</i>, <b>34</b><i>b </i>. . . to form turbulent wake patterns <b>100</b> in the cold aisle <b>45</b> partially defined by the at least one server rack <b>22</b><i>a</i>, <b>22</b><i>b </i>. . . , or the first or lower air foils <b>54</b><i>a</i>, <b>54</b><i>b </i>. . . , the second or upper air foils <b>34</b><i>a</i>, <b>34</b><i>b </i>. . . , and the ceiling members <b>65</b>′ or <b>75</b> to form turbulent wake patterns <b>100</b> in the cold aisle <b>45</b> partially defined by the at least one server rack <b>22</b><i>a</i>, <b>22</b><i>b </i>. . . , or the first or lower air foils <b>54</b><i>a</i>, <b>54</b><i>b </i>. . . , the air flow distribution system <b>80</b> and corresponding method may also be effected by utilizing only the second or upper air foils <b>34</b><i>a</i>, <b>34</b><i>b </i>. . . , and the ceiling members <b>65</b>′ or <b>75</b> to form the turbulent wake patterns <b>100</b> in the cold aisle <b>45</b> partially defined by the at least one server rack <b>22</b><i>a</i>, <b>22</b><i>b </i>. . . , or only the second or upper air foils <b>34</b><i>a</i>, <b>34</b><i>b </i>. . . to form the turbulent wake patterns <b>100</b>.

0081While several embodiments of the disclosure have been shown in the drawings and/or described in the specification, it is not intended that the disclosure be limited to these embodiments. It is intended that the disclosure be as broad in scope as the art will allow and that the specification be read likewise. Therefore, the above description should not be construed as limiting, but merely as exemplifications of particular embodiments. Those skilled in the art will envision other modifications within the scope and spirit of the claims set forth below.